Phylum [Mollusca] Linnaeus, 1758 - molluscs Class Gastropoda Cuvier, 1795 - snails and slugs Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795 Order Archaegastropoda see Order Archaeogastropoda Thiele, 1925 Superfamily Patellacea see Superfamily Patelloidea Rafinesque, 1815 1 Family Patellidae Rafinesque, 1815 - limpets 2 Family Acmaeidae Forbes, 1850 - American limpets